There is a known incompatiblity between Outlook 2000 and later versions related to reminders on meeting requests sent in iCalendar (aka iCal) format. To resolve this issue, do one of the following:
-- Contact Microsoft Product Support Services to obtain the Outlook 2000 post-SP3 hotfix described in this article: http://support.microsoft.com/?kbid=823199
-- Tell the senders to remove any reminder before sending you an iCal meeting request.
-- Tell the senders to send to you in native Outlook meeting request (RTF) format, not as iCal.

Signature
Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
http://www.turtleflock.com/olconfig/index.htm
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> Hi,
>
[quoted text clipped - 7 lines]
> Thanks and Regards,
> Govindaraj P.